Important Notices 2022年4月1日 CHSSL's Services from April 1st, 2022 (Update May 31) News More SystemOctober 30, 2024From 10:00 a.m. on Nov. 7, Our website will be downCloseJuly 22, 2024The CHSSL will be closed on Oct. 21-23.NewsMay 1, 2024Introducing CHSSL’s Digital Collections on JSTORNewsMarch 1, 2024Study Series No. 81 is availableSystemJanuary 25, 2024From 13:00 p.m. on Jan. 30, Our website will be downCloseOctober 26, 2023The CHSSL will be closed on Nov. 13-15.SystemOctober 4, 2023From 18:00 p.m. on October 5, Request form will be down